Hi. This Is Grace From Seyi. Magnesium Oxide Board Is Known As Magnessium Board, Mgo Board. The Main Raw Material Is Magnesium oxide(mgo), magnesium chloride(mgcl2), perlite,fiber glass mesh,etc. . ...
A dust Mask is A Flexible Pad Held Over The Nose And Mouth By Elastic Or Rubber Straps To Protect Against dusts encountered During construction or cleaning activities, ...